Class DTFJJavaRuntimeMemorySectionBase

java.lang.Object

com.ibm.j9ddr.vm29.view.dtfj.java.DTFJJavaRuntimeMemorySectionBase

All Implemented Interfaces:

ImageSection, JavaRuntimeMemorySection

Direct Known Subclasses:

DTFJGenericJavaRuntimeMemorySection, DTFJMemoryTagRuntimeMemorySection

public abstract class DTFJJavaRuntimeMemorySectionBase
extends Object
implements JavaRuntimeMemorySection

Field Summary

Fields declared in interface JavaRuntimeMemorySection

ALLOCATION_TYPE_MALLOC_FREED, ALLOCATION_TYPE_MALLOC_LIVE, ALLOCATION_TYPE_MEMORY_MAPPED_FILE, ALLOCATION_TYPE_SHARED_MEMORY, ALLOCATION_TYPE_VIRTUAL_ALLOC

Modifier and Type	Field	Description
static final int	ALLOCATION_TYPE_MALLOC_FREED	Type code for memory that was allocated, and freed, by the Java runtime on the native heap using malloc() or similar.
static final int	ALLOCATION_TYPE_MALLOC_LIVE	Type code for memory allocated on the native heap via an API such as malloc().
static final int	ALLOCATION_TYPE_MEMORY_MAPPED_FILE	Type code for memory allocated for memory mapping files through an API like mmap().
static final int	ALLOCATION_TYPE_SHARED_MEMORY	Type code for shared memory sections.
static final int	ALLOCATION_TYPE_VIRTUAL_ALLOC	Type code for anonymous memory mappings / virtual allocations.

Constructor Summary

Constructors

Constructor	Description
DTFJJavaRuntimeMemorySectionBase()

Method Summary

Modifier and Type	Method	Description
ImagePointer	getBaseAddress()	Gets the base address (the lowest) of memory in this section.
protected abstract long	getBaseAddressAsLong()
Properties	getProperties()	Get the OS-specific properties for this section.
boolean	isExecutable()	Tests executable permission on memory section.
boolean	isReadOnly()	Tests read permission on memory section.
boolean	isShared()	Tests shared permission on memory section.

Methods declared in class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods declared in interface ImageSection

getName, getSize

Modifier and Type	Method	Description
String	getName()	Gets the name of this section.
long	getSize()	Gets the size of the memory section.

Methods declared in interface JavaRuntimeMemorySection

getAllocationType, getAllocator, getMemoryCategory

Modifier and Type	Method	Description
int	getAllocationType()	Get memory allocation type code.
String	getAllocator()	Returns string describing the code that allocated this memory section.
JavaRuntimeMemoryCategory	getMemoryCategory()	Returns memory category this section was allocated under.

Constructor Details

DTFJJavaRuntimeMemorySectionBase

public DTFJJavaRuntimeMemorySectionBase()

Method Details

getBaseAddressAsLong

protected abstract long getBaseAddressAsLong()

getBaseAddress

public ImagePointer getBaseAddress()

Description copied from interface: ImageSection

Gets the base address (the lowest) of memory in this section.

Specified by:

getBaseAddress in interface ImageSection

Returns:

Base address pointer.

isExecutable

public boolean isExecutable()
                     throws DataUnavailable

Description copied from interface: ImageSection

Tests executable permission on memory section.

Specified by:

isExecutable in interface ImageSection

Returns:

true if the memory pages in this section are marked executable. False otherwise.

Throws:

DataUnavailable

isReadOnly

public boolean isReadOnly()
                   throws DataUnavailable

Description copied from interface: ImageSection

Tests read permission on memory section.

Specified by:

isReadOnly in interface ImageSection

Returns:

true if the memory pages in this section are marked read-only. False otherwise.

Throws:

DataUnavailable

isShared

public boolean isShared()
                 throws DataUnavailable

Description copied from interface: ImageSection

Tests shared permission on memory section.

Specified by:

isShared in interface ImageSection

Returns:

true if this section is shared between processes. False otherwise.

Throws:

DataUnavailable

getProperties

public Properties getProperties()

Description copied from interface: ImageSection

Get the OS-specific properties for this section.

Specified by:

getProperties in interface ImageSection

Returns:

a table of OS-specific properties for this section. Values which are commonly available include

• "readable" -- whether the memory section can be read from
• "writable" -- whether the memory section can be written to
• "executable" -- whether data in the memory section can be executed